diff --git a/utils.py b/utils.py
index 514b3bc..acc5192 100644
--- a/utils.py
+++ b/utils.py
@@ -51,8 +51,8 @@ def big_to_small( indexes , factor ):
 
 def small_to_big( indexes , factor ):
     """
-    convert a coordinate of a point n the compressed data to the same coordinate
-    in the compressed one
+    convert a coordinate of a point in the compressed data to the same coordinate
+    in the non compressed one
     """
     if not isinstance( indexes , int ) and not isinstance( indexes , list ) and not isinstance( indexes , np.ndarray ):
         raise ValueError( 'indexes must be an integer or a list, ' + type( indexes ) + ' given' )